JPS5864772A - Lead storage battery for power - Google Patents

Abstract

PURPOSE:To obtain the captioned battery whose energy density during high output discharge is enhanced and whose life performance is improved, by lowering the apparent density of the positive active material and by using as the separating part a ribbed or a corrugated, finely perforated plate. CONSTITUTION:In a power lead storage battery, a positive plate where the apparent density of the positive active material is 3.2g/cm<3> is employed. Also, in the separating part, a ribbed plate or a corrugated, finely perforated plate is employed separately. Furthermore, the grid frame structure of the positive electrode plate is made to be Japanese shoji-like (paper sliding door) and the thickness shall be less than 1.0mm.. Consequently, generation of high output and also reduction of the weight of the lead storage battery can be achieved without lowering the power characteristic thereof.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power marine battery, and more particularly to improvements in its primary, secondary and separator sections.

In order to prevent pollution caused by internal combustion engine exhaust gas and to move away from petroleum, in other words, to diversify energy sources, so-called hybrid systems that use other energy sources such as fuel cells or gas turbine engines in combination with power batteries have recently become popular. Please consider various things. Efforts have been made to improve Ie and batteries for this type of power battery, but a battery with large power and the ability to extract large amounts of energy at that time has yet to be realized.

The present invention has the power characteristics of lead-acid batteries as well as D
The purpose is to increase the energy density and further improve the performance of the temple.

The gist of the present invention to achieve the above object is to reduce the apparent density of the knee active material, use a ribbed or corrugated perforated plate alone as the isolation part, and furthermore, use the knee lattice as a shoji crosspiece, and It was evaluated by a cycle test with a plate thickness of 1.0 fit.

The results of this method show that the apparent density of the zeta-positive active material cannot be reduced, and the density must be increased, especially in batteries that do not use a glass mat in the isolation section. However, the charging and discharging pattern of the power battery in a hybrid system consists of a shallow discharge with a large current and a constant voltage charge, and the JI
This is significantly different from the cycle life test conditions of No. 8. Therefore, we conducted life tests on various prototype batteries using a hybrid pattern. The test battery had a 5-hour rate discharge of 8 times at approximately 40 mh, discharged at 120 m for 1 minute, and charged at a maximum voltage of 120 m, with a constant current of maximum voltage EE of 2.5 V/cell.
The lifespan was evaluated as constant voltage. The test results are shown in Table 1.

Table 1 In Table 1, the lattice beams are the same as those shown in Figure 1 (al), the shoji are the first microperforated plates, and G is the glass mat. It is expressed as the difference between the end pressure at 10 seconds and the energy density at T2 after discharging to 1.oV/cell.

As is clear from Table 1, a battery with a large current discharge where the electron drop is small and the energy density at that time is large (wh/#) has a thin positive electrode plate. The apparent density of the substance is smaller, and the ribbed separator (ribbed separator) is smaller than the one that uses a flat plate-like separator (flat separator (flat separator) and glass mat CG) for the separator Ili part.
Each of them is excellent.

,, J18 cycle life performance tends to be opposite to power characteristics, and as is well known, the thicker the positive electrode plate, the higher the apparent density of active material, but the The combined use of flat sepasure and G is shown respectively. However, the life performance of a hybrid/(turn(/1) battery depends on the thickness of the slag plate and the apparent density of the live material! The influence of the apparent density is not very large, and the battery using a glass mat for the MN is significantly inferior. .

In other words, for the active material, the apparent acoustic intensity of the active material is 8.2g, which is different from JI8 under the usage conditions of the hybrid pattern.
It was found that the performance was not degraded even when the value was less than /4, and @conversion was possible. Regarding the structure of the latticework, shoji was superior to zidori.

The above-mentioned life performance is a completely new fact that could not be found in conventional JI8 compliant tests. The reason for this is not clear, but in a small electric current discharge, both the inside and the surface of the active material layer are used uniformly, but in a large current, only the surface is discharged, and in a deep discharge, the volume expansion is large and the active material falls off. However, in shallow discharge, it is not necessary to compress and hold the active material even if the current is large, and constant current charging involves intense gas generation, so it shows the same phenomenon as deep discharge. It is thought that baldness is related to this.

As described above, the present invention enables a high-output, yet lightweight power marine storage battery.

[Brief explanation of drawings]

FIG. 1 is a tentative cross-sectional view ft1J showing the arrangement of the lattice bars.

Claims (1)

[Scope of Claims] Yama: A power crude lead T7I battery having a positive temporary active material having an apparent Wi degree of 8.2 g/d or less and an ms part using a ribbed or corrugated microporous plate alone. Claims: The power ship storage battery according to claim (1), in which the crosspiece structure has a shoji-like thickness of 1.0 as+ or less.